1.
According to the text, many elements are
Within few decades, the Earth might run out of several important elements and metals. This conclusion is based on a periodic table prepared by the American Chemical Society.
The table shows that 44 out of 118 elements known today will face supply limitations. Among those under a "serious threat in the next 100 years" are rare elements, precious metals, and even essentials like phosphorous.
Gallium is a blue-white metal discovered in 1831. It has a low melting point and resists oxidization, which makes it suitable for manufacturing optical mirrors. Increased use in manufacturing flat-screen TV sets and computer monitors is leading to its scarcity.
Indium, an element similar to gallium, is used in the control rods of nuclear reactors. With high consumption, Indium too might not be around for long.
The well-known element zinc, which is mixed with copper to make brass, might not be available by 2037, according to Dr Reller’s estimate.
Similarly, silver--which is used extensively to make coins, jewelry, and sensitive radio frequency antennae--might not survive after 2029, according to a 2010 paper in Scientific American.
According to the text, many elements are
Which element has a low melting point?
According to the periodic table, how many elements are under threat?
Increased use is leading to its scarcity.
In the above sentence, what does the word lead mean?
Among them are rare elements and precious metals.
In the above sentence, the word rare is used as
What will happen when silver is no longer available?
月額1,000円〜 最新のニュース記事で手軽に始めるビジネス英語学習
もっと沢山の記事を読んで学習をしたいなら、Business English Pro 、 1日10分ビジネス英語 の受講がお薦めです！
Business English Pro と 1日10分ビジネス英語なら記事は週5日間、最新のニュースを使った学習記事が毎日配信されます。
さらに Business English Proなら
